摘要:
The invention is directed to a process to continuously treat a hydrogen sulphide comprising gas, said process comprising the following steps:
(a) contacting the hydrogen sulphide comprising gas with an aqueous alkaline liquid comprising sulphide-oxidising bacteria and elemental sulphur particles thereby producing a loaded aqueous liquid comprising dissolved sulphide, polysulphide compounds, sulphide-oxidising bacteria and elemental sulphur particles and a gas having a lower content of hydrogen sulphide, and passing the loaded aqueous liquid through a polysulphide reactor zone comprising one or more plug flow reactor zones, (b) contacting the loaded aqueous liquid with an oxidant to enable the sulphide-oxidising bacteria to oxidise sulphide to elemental sulphur, thereby producing an enriched aqueous liquid comprising an increased amount of elemental sulphur particles and (c) separating elemental sulphur particles from the enriched aqueous liquid, wherein the residence time of the loaded aqueous liquid between its preparation in step (a) and its supply to step (b) is between 3 and 45 minutes, and wherein the content of elemental sulphur as part of the polysulphide compounds in the loaded aqueous liquid [S0 in Sx2−] as supplied to step (b) is above 0.7 mM.
摘要:
A treatment process for remediating contaminants in a mixture of contaminated fluids, including at least one liquid fluid and at least one gaseous fluid, includes the steps of: preparing a liquid treatment composition containing at least 80 volume % of an aqueous solution containing at least one hydroxide compound at a collective concentration of 35-55 weight percent, and at least one of fulvic acid and humic acid at a collective concentration of 0.1-5 wt % of the treatment composition; adding a dosage of the treatment composition to a mixture of contaminated fluids including a liquid portion and a gaseous portion; and allowing the treatment composition to react with the mixture of contaminated fluids for at least 10 minutes, wherein a pH of the treatment composition is at least 13.0 and the aqueous solution contains at least one of NaOH and KOH.
摘要:
A scrubbing solution for removing contaminants, including particularly hydrogen sulfide, from a fluid. The scrubbing solution includes at least one scrubbing reagent which has a primary or secondary amine and an acid, which may be phosphoric acid. The fluid being scrubbed is passed through the scrubbing solution. The contaminants react with the scrubbing reagent securing them in the scrubbing solution. The fluid being scrubbed and the scrubbing solution are then separated. The scrubbing solution is heated and, if the scrubbing solution is under pressure, the pressure is reduced. The acid facilitates thorough removal of the contaminants, and especially the hydrogen sulfide, from the scrubbing solution. The scrubbing solution is then ready for reuse. Because the scrubbing solution is rendered substantially free of hydrogen sulfides, it can absorb other sulfide contaminants that might not otherwise be absorbed.
摘要:
A method for maintaining solvent quality in a gas treating system involves calculating, by an advisory system for continuous monitoring of the gas treating system, a water content deficit in the solvent of the gas treating system, calculating, by the advisory system, a water makeup rate compensating for the water content deficit, and displaying, in an interactive user interface of the advisory system, the water makeup rate.
摘要:
A method for providing a fuel includes providing a partially purified biogas at a first processing site, where the partially purified biogas is produced by multiple biogas sources and/or from multiple feedstock sources. The partially purified biogas is compressed, fed to a mobile tank, and transported by vehicle to a second processing site. At the second processing site, which may also receive biogas from a plurality of biogas sources, the partially purified biogas is further processed to produce a fuel or fuel intermediate.
摘要:
A gel particle film of amino group-having polymer compound particles has a large acid gas absorption amount and desorption amount per unit volume, and has a high acid gas absorption rate and desorption rate per unit mass, and further has high stability. A gas absorber having the gel particle film supported on a carrier is useful as an acid gas separation material having good energy efficiency.
摘要:
The present description is related to the field of hydrocarbon production by gasification of carbonaceous material. It provides a two-stage gas washing method as a part of gas refining. More specifically it discloses a method for hydrogen sulfide and carbon dioxide removal from synthesis gas produced by gasification. It introduces a use of a novel combination of wash approaches for this application. As a specific application, this process is utilized as a part of biomass to liquid (BTL) process.
摘要:
Hydrogen sulfide is scrubbed from a gas stream to prepare dissolved alkali metal sulfide or hydrosulfide, which is used to prepare feed electrolyte solution for electrochemical processing to generate alkali metal hydroxide in catholyte and polysulfide in anolyte, which may be recovered from an electrochemical reactor and which may be subjected to further processing to precipitate elemental sulfur. Aqueous scrubbing solution may include alkali metal carbonate capture agent to capture hydrogen sulfide in alkali metal bicarbonate The gas stream may include carbon dioxide in addition to hydrogen sulfide, and a ratio of dissolved alkali metal carbonate to bicarbonate may be increased prior to electrochemical processing.
摘要:
Disclosed are systems and methods which provide a process stream comprising a gaseous component, capture the gaseous component from the process stream by an ionic liquid solvent of a separator, and recover a captured gaseous component from the ionic liquid solvent in a regenerator. A second gaseous component from the process stream may be captured by the ionic liquid solvent of the separator, and the second gaseous component may be recovered from the ionic liquid solvent in the regenerator. Alternatively, the second gaseous component from the process stream may be uncaptured by the ionic liquid solvent, and the uncaptured second gaseous component may be recovered from a membrane unit.
摘要:
Method for extracting a gas from a gas mixture by: during a purification step, bringing a first sorption medium into contact with the gas mixture in order to extract the gas from the gas mixture, whereby an enriched first sorption medium is formed in which the gas is at least partially sorbed; during a regeneration step, bringing a second sorption medium into contact with the enriched first sorption medium in order to extract the gas from the enriched liquid first sorption medium; whereby for the contact in the purification step and/or in the regeneration step use is made of a separate venturi ejector.